35. Async
Error handling (and their are asynchronous and distributed)
Monitoring a progress of request flow
Security
QoS
IoC (on the architecture level)
Dealing with past events
Skills of developers and programmers
Callback hell
36. Security
Sign in/ssl/keys (we know everything about this)
How we can confirm that data from queue are safe and
trustable?
What we can do if remote systems unexpectably sends
to us many strange requests (as part of the botnet)
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